40464631428 has 24 divisors (see below), whose sum is σ = 101680356288. Its totient is φ = 12450655776.

The previous prime is 40464631399. The next prime is 40464631439. The reversal of 40464631428 is 82413646404.

It is a self number, because there is not a number n which added to its sum of digits gives 40464631428.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129694176 + ... + 129694487.

It is an arithmetic number, because the mean of its divisors is an integer number (4236681512).

Almost surely, 2^40464631428 is an apocalyptic number.

It is an amenable number.

40464631428 is an abundant number, since it is smaller than the sum of its proper divisors (61215724860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40464631428 is a wasteful number, since it uses less digits than its factorization.

40464631428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259388683 (or 259388681 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 42.

The spelling of 40464631428 in words is "forty billion, four hundred sixty-four million, six hundred thirty-one thousand, four hundred twenty-eight".